88985821 has 4 divisors (see below), whose sum is σ = 89004700. Its totient is φ = 88966944.

The previous prime is 88985807. The next prime is 88985839. The reversal of 88985821 is 12858988.

It is a happy number.

It is a semiprime because it is the product of two primes, and also a brilliant number, because the two primes have the same length.

It can be written as a sum of positive squares in 2 ways, for example, as 19263321 + 69722500 = 4389^2 + 8350^2 .

It is a cyclic number.

It is not a de Polignac number, because 88985821 - 2¹⁹ = 88461533 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (88905821) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 4225 + ... + 13993.

It is an arithmetic number, because the mean of its divisors is an integer number (22251175).

Almost surely, 2^88985821 is an apocalyptic number.

It is an amenable number.

88985821 is a deficient number, since it is larger than the sum of its proper divisors (18879).

88985821 is an equidigital number, since it uses as much as digits as its factorization.

88985821 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 18878.

The product of its digits is 368640, while the sum is 49.

The square root of 88985821 is about 9433.2296166265. The cubic root of 88985821 is about 446.4507983289.

The spelling of 88985821 in words is "eighty-eight million, nine hundred eighty-five thousand, eight hundred twenty-one".